James arthur



(No Model.)

J. ARTHUR'.

STRAIGHTWAY VALVE.

Patented May 9, 1882s UNITED STATES JAMES ARTHUR, 0F JERSEY CITY,ASSIGNOR OF ONEHALF TO I.VILLIAM S. CARRVOF PATERSON, NEW JERSEY. l

PATENT @Enrica STRAIGHT-WAY VALVE.

SPEGIFICATIONformng part of Letters Patent No. 257,634, dated May 9,1882.

l Application tiled November 25, 1881. (No model.)

To all whom it may concern:

Beit known that I, JAMES ARTHUR, ot' Jer sey City, in the county ofHudson and State of New Jersey, haveinvented an Improvement inStraight-Way Valves, dt' which the following is a specification.

Straight-way valves have been iliade with two disks with circularinclines at their backs, and either the disks or an intermediate devicethat hasbeen turned slightly as the valves are pressed down to place, sothat the inclines act to press the valves outwardly to their seats.These devices are complicated, liable to become obstructed by sediment,and the valves do not always draw back from their seats to relieve thefriction.,

I make use of two similar valvedisks, each of whichis provided with`interlocking cylindrical hubs and nclines, whereby the two disks areretained in their proper rela-tive positions, but the disks can turn oneagainst the other, and I combine with thesea wedge-shaped lifteroperated by the screw. This lifter when raised turns the disk-val ves,so as to relieve the press ure on 4thevalve-seats, and then lifts thevalves,

and when this lifter is forced down it presses the valves and causesthem to partially turn after each valve rests at one side on aprojection, so that the inclines on the backs of the disks force themfirmly against their seats.

In the drawings, Figure l is a vertical sectioncrosswise ofthe valves atthe line yy, Fig. 2. Fig. 2 is a rear view ofone valve-disk and sectionof the case at the line w a'. Figs. 3 and 4 represent modifications otthe screw for operatin g the lifter. Fig. 5 is a separate plan of thetwo disks detached, and Fig. G is an edge view of a disk with numerousinelines.

The valve-case a and water-pipes b are otl ordinary construction. Theseats c for the valves are around the ends of the pipes b, inside thecase. These seats may be ot' brass screwed to 'place or of ordinarycastiron. The screw (Z may pass through the wedge-shaped lifter c,

hereinafter described, and be revolved toy move it up or down, as shownin Figs.1 and 2, the lifter c forming a nut to the screw; or if the nutis revolved, as is the case in some straight-way valves, then the liftermay be at the lower end ot the screw, as represented in Fig. 3; or thescrew may be made, as seen in Fig. 4, so as to. be revolved and rise andfall in a stationary nut, my improvements being available with all ot1these well-known styles ot' actuating-screws in straigh t-way valves.

The valves 7L and 7c are .made as disks with iiat faces, and at the backare cylindrical interlocking projections, the portioni passing into thecylinder o, so that the valves It and k cannotseparate laterally, butone disk can partially revolve on the other.

The inclinesl mare made as segments of cyl inders, and they are similarin shape, and are 'at the back of each valve, and there is a lug orprojection at a on each disk adjacent to the wed ge-shaped lifter c, andanother lug, .9,near the outer edge of each disk.`

The backs of both disks being the same, except in the interlockingcylindrical anges t and o, theycould be cast from one changeablepattern, and theinclines will properly rest upon each other, and can berubbed together to smooth and finish them. Thus but little handwork willbe required. One lug u ot' one valve will beat one side ofthe lifter cand the other lng` of the other disk will be at theother side ot' thelifter e, as seen in Fig. 6. Hence, as the lifter c is raised its firstaction will be to force the lugs a apart in consequence of its wedgeshape, and in so doing thedisks will be turned partiallyon cach otherand the inclines moving down each other allows the valvedisks toapproach nearer together and draw away from the valve-seats, after whichthe projecting bases c of the lifter c will lift the valve-disks bodilyin opening the valve; or the valve-disks will be lowered bodily by thereverse movement ofthe screw, and in so doing the valve-disks willnearly reach their places before the lugs s will come into contact withthe stops t, that project inside the case a. When this occurs the weightot' the Avalvedisks will tend to partially rotate suoli disks inopposite directions, because the disk It rests on the stop s at one sideot the case, and the disk k rests upon the stop s at the other side sideof the case. This turning movement causes the inclines to run up eachother, and

force the faces of the valve-disks rmly to their seats. The lower partof the lifter e, act# ing against the circular interlocking flanges i,forces the center of the Valves downwardly, in suring the perfectclosing of the valve. The reverse movement of the screw relieves thepressure, turns the disks, and then lifts them, as before described.

I remark that in cases where the screwdextends across the water-way thecylindrical flanges i and o will be notched for it to pass freelythroughthem. It' the screw itself moves up and down,either in consequence ofrotating the screw itself in a stationary nut, or of rotating the nut,the notches in t' and o will not be needed.

1f the lifter is not made wedgeshaped,it will still be operative, as theweight ot' the valvedisks hanging by the studs n will tend to partiallyrotate such disks to relieve them from pressure against the seats c.

By employing several sets of segmental inclines at the backs of thedisks, as illustrated by the detached view, Fig. 6, the inclines inlarge valves can be as steep as those on small valves, and these inclneswill take no more space between large disks than with small disks, andthe necessary movement will be given to the disks in pressing themagainst their seats by about the samedistance ofrnovement of oneperiphery in relation to the other in large as in small valves.

I cla-im as my invention- 1. The combination, ina straightway valve, oftwo disks, interlocking anges .on their backs, segmental inclines, awedgeshaped lifter, a screwto operate the same, and the projections andstopss t, substantially as set forth. n

2. In combination lwith the disks placed back to backin a straight-wayvalve, awedgeshaped lifter introduced betweenthe disks and mechanism foroperating the same so as to give a partial rotation to the valve-disksin commencing to lift the same, substantially as set forth.

3. In a straight-way valve, two disks, each having similar segmentalinclines upon the back, a projection by which it is lifted, and aprojection by which its .downward movement is arrested, in combinationwith the screw and lifter and a case having the projections t, substantially as set forth.

Signed by me this 23d day of November, A. D. 1881.

JAS. ARTHUR.

Witnesses:

GEO. T. PINGKNEY, GHAs. H. SMITH.

